Improvement in lumber-chutes



W. VAN NAME & LA. WAKEFIELD.

Lumber Chutes.

Patented Jan. 28, 1873*.'

AM PHora-umosnAm/c ca N. x(osaaRNes Peach-ss) UNITED STATES PATENT GFEICE.

WILLIAM VAN NAME AND JAMES A. WAKEFIELD, OF CHIPPEWA FALLS,

WISCONSIN.

IMPROVEMENT IN LUMBER-CHUTES.

Specification forming part of Letters Patent No. 135,302, dated January 28, 1873.

To all whom 'it may concern.'

Be it known that we, WILLIAM VAN N AME andJAMEs A. WAKEFIELD, of Chippewa Falls, in the county of Chippewa and State of Wisconsin, have invented a new and Improved LumberChute, of which the following is a specification Our invention consists in the construction and arrangement, hereinafter described, of a log-chute with a double gate hinged together, and arranged upon the bottom ofthe way between the side pieces with a water-space under it, to which a passage is provided from the head of the chute to admit water under the hinged gate to regulate the height of the dam, which the hinged gate constitutes when raised by the water below it, and from which there is an escape-passage to let the water escape from under the hinged gate when the dam is to be lowered.

Figure 1 is a perspective view of our improved lumber-chute. Fig. 2 is alongitudinal section. Fig. 3 is a plan view of part of the chute, and Fig. 4 is partly a plan view and partly a horizontal section of part of the chute.

Similar letters of reference indicate corresponding parts.

A is the bed-piece, which is placed on the bed of the stream. B B are the piers or bull:- heads on each side, up to which the earth dam C is built. D and E are the two parts of the gate, constituting the dam in the chute; they are hinged together at F, and E is hinged to the bed-piece at Gr. H is the space under them, to which kthe water flows through the gateI and flume K to raise them up for damming the water back. L is the passage for drawing oft' the water when the dam is to be lowered 5 it opens to the lower side of the dam C to allow the water to run away, and has a gate for stopping it while the water is required to be retained under the gate D E. The bedpiece slopes downward below the gates D E for chuting the lumber, as shown at N, and

has an apron, M, hinged to it at O, to adjustv to the bed of the stream; and to the lower end of the apron there are bars or fingers P hinged to it as a prolongation of it, which is also capable of conforming` to the bed of the stream.

Having thus described our invention,. we claim as new and desire to secure by Letters Patent- 1. The combination and arrangement of the bed A, piers B, dam C, gate D E, chamber H, flume K, passage I L, and gates therefor, all substantially as specified.

2. The apron M hinged to the bed-piece, and the bar P hinged to the apron, substantially as specified. y

v WILLIAM VAN NAME.

JAMES A. WAKE FIELD. Witnesses:

CEAS. T. REID, A. L. SMITH. 

